Mechanical Pumps
NAVAC Dry Vacuum Pumps
AJA International offers NAVAC vacuum pump solutions to support a wide range of laboratory, industrial, and research applications. With options for both oil-sealed rotary vane and oil-free dry screw designs, NAVAC pumps deliver reliable performance at an economical price point.
NAVAC NRD M – Dual-Stage Oil-Sealed Rotary Vane Pumps
The NAVAC NRD M series is a compact, dual-stage rotary vane vacuum pump designed to deliver stable, efficient, and reliable performance for laboratory, research, and industrial applications. With features such as a forced oil circulation system, integrated anti-suckback valve, and convenient oil inspection window, the NRD M series combines durability and ease of maintenance in an economical package.
Key Features
Dual-stage oil-sealed rotary vane design — delivers high ultimate vacuum and stable operation
Built-in anti-suckback valve — prevents oil backflow and chamber contamination during shutdown
Gas ballast function — enhances water vapor handling capability
Clear oil sight glass — easy oil level monitoring and maintenance
Compact and lightweight — ideal for benchtop or integrated system use
Low noise and vibration — quiet, smooth operation
Forced oil circulation system — ensures consistent lubrication and long service life
Applications
Thin film deposition systems (sputtering, evaporation, CVD)
Analytical and research instruments
Laboratory and industrial vacuum processes
General-purpose vacuum support and roughing operations
NAVAC HD20 HelixDrive Dry Screw Pump
The HD20 HelixDrive is an oil-free dry screw pump engineered for clean, high-throughput applications. With a 20 m³/h pumping speed and ultimate pressure down to 1×10⁻⁴ mbar (~0.01 Pa), it is ideal for thin film, semiconductor, and R&D processes where oil contamination cannot be tolerated.
Key Features
Oil-free HelixDrive screw design – no risk of oil backstreaming
High pumping capacity – 20 m³/h (12 CFM) supports larger systems
Quiet operation – noise level ≤ 60 dB(A)
Rugged and reliable – durable coatings and thermal management for long service life
Compact footprint – easy to install and integrate into vacuum systems
Low maintenance – no oil changes or disposables required
Technical Specifications
Pumping Speed: 20 m³/h (12 CFM)
Ultimate Pressure: 1×10⁻⁴ mbar (~0.01 Pa) (gas ballast off)
Inlet/Outlet: KF25 (NW25)
Weight: 48 kg
Noise Level: ≤ 60 dB(A)
Power Consumption: ~0.75 kW
Applications
Thin film deposition – sputtering, evaporation, CVD systems
Semiconductor manufacturing – contamination-sensitive process environments
Industrial R&D – pilot lines, clean labs, and research systems
Backing pump – supports turbomolecular or booster pumps in high-vacuum setups